JPH065404U - Flat plate for cultivator - Google Patents

Abstract

(57) [Summary] [Purpose] Muddy soil protrudes from the left and right sides of a flat plate of a tiller, such as a rotary crushing and scraping device, which is attached to the rear part of a tractor via a three-point link mechanism. (EN) Provided is an improved tillage implement so as not to interfere. [Structure] A cultivating work machine that is mounted on the rear part of a tractor via a three-point link mechanism so that power is transmitted from the PTO shaft of the tractor to the gear box of the work machine and a flat plate is provided behind the rotary work section. Therefore, a large number of three-dimensional notches having bulges in the front-rear direction are formed at predetermined intervals over the entire lengthwise direction of the flat plate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention prevents the mud from sticking out to the left and right sides of a flat plate of a tiller, such as a rotary crushing and scraping device, which is mounted on the rear part of a tractor via a three-point link mechanism. It relates to an improved tillage implement.

[0002]

[Prior art]

 Conventionally, a long tiller was installed on the left and right like a rotary crusher / scraper at the rear of the tractor via a three-point link mechanism, and power was transmitted from the PTO shaft of the tractor to the gearbox of the tiller. In addition, there is known a tilling machine in which a flat plate is provided behind the rotary working section. And, in the above-mentioned conventional flat plate of the tiller, a flat notch is provided at the tip.

[0003]

[Problems to be solved by the device]

 By the way, the notch of the flat plate is a flat one, and when carrying out scraping work with the flat plate in a nearly horizontal state, the water and mud accumulated on the front side of the flat plate from the rotary working part are removed from the working machine. There was a problem that it protruded to the side and the leveling performance was not good and it was necessary to perform leveling work many times. The present invention has been made to solve the above problems.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is mounted on a rear portion of a tractor through a three-point link mechanism so that power is transmitted from a PTO shaft of the tractor to a gear box of a working machine, and a rear portion of a rotary working portion is provided. In a tilling machine provided with a flat plate, the flat plate is characterized in that a large number of vertical notches having bulges in the front-rear direction are formed at predetermined intervals over the entire length direction of the flat plate. is there.

[0005]

With the above structure, the flat plate of the tiller according to the present invention has a large number of three-dimensional notches having bulges in the front-rear direction formed at predetermined intervals over the entire length of the flat plate. Therefore, when performing scraping work, water and mud accumulated on the front side of the flat plate from the rotary working section are positively discharged rearward from the three-dimensional cutouts, and there is no protrusion to the side of the working machine. As a result, the leveling performance is improved and the work efficiency is improved.

[0006]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. 1 to 3, reference numeral 1 is a rotary type tilling machine having a long length in the left-right direction and having a function of crushing and scraping, and a well-known front tractor including a top link and a lower link of a tractor (not shown). A connecting portion 2 to a tractor connected to the three-point link mechanism is provided so that the tractor can be mounted on the rear portion of the tractor so as to be able to move up and down. In addition, power is transmitted from the PTO shaft of the tractor to the gear box 3 of the tiller 1 through a universal joint, a transmission shaft, etc., via an input shaft (not shown).

Working device portions 5 and 5 including transmission systems 4 and 4 extending from the gear box 3 to the left and right sides are linked by link rods 7 from both left and right sides of a central portion 6 including the gear box 3. It is rotated by 90 degrees in the front-rear direction about the hinges 8 and 8 by human power, and is displaced between a working state in which it is developed in the left-right direction and a folded state in which it is folded toward the rear of the machine. Then, between the left and right side portions of the central portion 6 of the front part of the machine body and the work device portions 5, 5, the work device portions 5, 5 are automatically locked when the work device portions 5, 5 are deployed in the working state, and the work device portions 5, 5 are locked. A work state lock mechanism 9 is provided to release the lock manually when folding.

As shown in FIGS. 4 and 5, the working state lock mechanism 9 has lock pins 10 and 11 mounted on the working device portions 5 and 5 side, and shafts 12 and 13 on the central portion 6 side. Pivotally supported engagement hooks 14 and 15 are provided so that they can be engaged (locked) and disengaged (unlocked). The operating lever 16 is fixed to the engaging hook 14, and the connecting arms 17 and 18 are coaxially fixed to the engaging hooks 14 and 15, respectively, and the connecting arms 17 and 18 are connected by a connecting rod 19. The connecting rod 19 penetrates through the pipe frame 6b which connects the vertical frames 6a of the central portion 6 and 6a in the horizontal direction. Further, a toggle spring 20 composed of a torsion spring is installed between the engaging hook 14 and the central portion 6, and the engaging hook 15 is provided with an automatic return lever 21.

The working state lock mechanism 9 engages with the lock pins 10a and 11a that move as shown in FIG. 4 when the working device portions 5 and 5 are deployed to the working state (FIGS. 1 and 2). By sliding along the inclined surfaces (cam surfaces) 14a, 15a of the hooks 14, 15, the engaging hook 14 is pushed up against the elastic force of the toggle spring 20 within a range not exceeding the dead point O, At the same time, the engaging hook 15 is pushed down and rotated to automatically lock. When folding the working device parts 5 and 5, the operating lever 16 is held and rotated to the imaginary line of FIG. 4, that is, the state of FIG. 5 against the elastic force of the toggle spring 20. Then, as the engaging hook 14 and the connecting arm 17 rotate, the engaging hook 15 rotates via the connecting rod 19 and the connecting arm 18, and the lock pins 10 and 11 are unlocked. 20 exceeds the dead point O and holds the engagement hooks 14 and 15 in the unlocked state.

When the engagement hooks 14 and 15 are unlocked, the lock pin 11 is engaged with the automatic return lever 21, and when the work device parts 5 and 5 are folded in this state. , The lock pins 10 and 11 respectively move in the directions of the arrows, the automatic return lever 21 is pushed up and the engaging hook 15 rotates, the connecting arm 18 and the connecting rod 19 rotate, and the toggle spring 20 reaches the dead point. When O is exceeded, the work state lock mechanism 9 is returned to the state shown in FIG. 4, that is, the lock state (lock standby state). The toggle spring 20 is set such that, while the operation lever 16 is rotated by 45 degrees, 30 degrees is elastically held in a locked state and 15 degrees is elastically held in an unlocked state.

Corresponding to the link rod 7 which is moved by the turning motion when folding the working device portions 5, 5, as shown in FIGS. 6 to 8, the central portion 6 and the working portion 5 are folded as shown in FIG. Between the working device parts 5 and 5, the working device parts 5 and 5 are automatically locked when the working device parts 5 and 5 are folded 90 degrees from the unfolded state to the folded state, and the working device parts 5 and 5 are folded to the folded state of FIG. 1 to FIG. 2 and the work state shown in FIGS. 1 and 2, the folding state lock mechanism 22 is configured so that the lock is released manually and the work device portions 5 and 5 are unfolded to return to the locked state. It is provided.

The folding state lock mechanism 22 pivotally supports the engagement hook 24 on the central portion 6 by a shaft 23, and engages (locks) the engagement hook 24 with a lock pin 25 attached to the link rod 7. It is provided so that it can be unlocked (unlocked). An operation lever 26 is fixed to the engaging hook 24, and a toggle spring 27, which is a torsion spring, is provided between the engaging hook 24 and the central portion 6. Further, an inclined surface (cam surface) is formed on the engaging hook 24, an automatic return lever 28 is attached, and a contact pin 29 is provided on the link rod 7.

Then, the folding state lock mechanism 22 folds the working device portions 5 and 5 from the unfolded state (FIGS. 1 and 2) to the working state and rotates 90 degrees to the folded state (FIG. 3). The pivot rod moves the link rod 7 and the lock pin 25, and the lock pin 25 slides along the inclined surface (cam surface) 24a of the engagement hook 24 to move the engagement hook 24 of the toggle spring 27. It pushes up within the range that does not exceed the dead point O against the resilience and automatically locks (state of FIG. 6). Further, when the working device portions 5, 5 are deployed to the working state, the operating lever 26 is held and rotated to the state shown in FIG. 8 against the elastic force of the toggle spring 27. Then, the locked state of the engagement hook 24 and the lock pin 25 is released, the toggle spring 20 crosses the dead point O in the middle of the process, and holds the engagement hook 24 in the unlocked state.

When the engagement hook 24 is in the unlocked state, the automatic return lever 21 is in contact with the contact pin 29. In this state, when the working device portions 5 and 5 are rotated to the working state, the link rod 7 And the lock pin 25 moves. By this movement, the automatic return lever 21 is sequentially pushed up by the contact pin 29 to rotate the engagement hook 24, the toggle spring 27 goes beyond the dead point O, and the folding state lock mechanism 22 is moved to the state shown in FIG. That is, the lock state (lock standby state) is restored. As with the toggle spring 20, the toggle spring 27 is set so that, while the operation lever 26 rotates 45 degrees, 30 degrees is held in a locked state and 15 degrees is held in an unlocked state. ing.

With the working device portions 5, 5 of the tiller working machine 1 deployed in the working state shown in FIGS. 1 and 2, the central portion 6 and the working device portions 5, 5 (rotary working portion) are provided behind the drawing. As shown in FIG. 1 and FIG. 9, a flat plate 30 is provided so as to be divided in two in the length direction, and both flat plates 30 have a bulge in the front-rear direction over the entire length thereof. A large number of three-dimensional notches 31, 31, ... Are formed at predetermined intervals. Incidentally, the notch for draining water in the conventional flat plate was a plane notch. For this reason, during the scraping work, the water and mud to be leveled were protruding to the side of the level plate.

When the three-dimensional cutouts 31, 31, ... Are formed in the flat plate 30 as described above, when the plowing work is performed by the tilling work machine 1, as shown in FIG. The surface of the field is leveled so that water and mud collected in the inside of 5, especially on the front side of the flat plate 30 escape rearward from the three-dimensional cutouts 31, 31. Therefore, the leveling performance is improved without water and mud like the conventional leveling plate protruding from the side of the leveling plate and having to perform the leveling operation many times. The flat plate 30 and the three-dimensional cutouts 31, 31 ... Are not limited to the folding type tilling machine as in the present embodiment, but can be similarly applied to a non-folding type.

When the working device portions 5 and 5 are rotated 90 degrees in the front-rear direction about the hinge portions 8 and 8 to be in a working state and a folding state, transmission systems 4 and 4 extending from the gear box 3 to the left and right sides. Dog clutches 32 and 33 are provided in the device, and the clutch engagement / disengagement operation is automatically performed by the rotation of the work device parts 5 and 5. At this time, in the folded state as shown in FIG. 3, when moving in the field by the tractor, mud repelled by the tire of the tractor may enter the dog clutch 33. Therefore, in the present invention, in conjunction with the pivotal movement of the working device portions 5, 5, the dog clutch 33 is covered in the folded state, and the covers 34, 34 are arranged to be removed in the working state. .

As shown in FIGS. 11 to 13, the cover 34 is fixed to the eccentric support arm 35 and rotatably supported by the support cylinder 36. The cover 34 has a pivot contact pin 37 at the tip of the eccentric support arm 35. Is provided, and the rotation contact pin 37 is brought into contact with the contact portion 38 formed on the hinge portion 8. Further, the cover 34 covers the dog clutch 33 when it is lowered by the weight of the cover 34 itself due to the eccentricity of the eccentric support arm 35 as shown in FIG. The cover is released when the eccentric support arm 35 is rotated by being pushed by.

When the working device portions 5 and 5 are rotated in the front-rear direction about the hinge portions 8 and 8 to be in the working state of FIG. 1, the cover 34 is contacted by the rotation contact pin 37. It is pushed by the contact portion 38, the eccentric support arm 35 is rotated so as to lift the cover 34, and the dog clutch 33 is not covered. Further, when the working device parts 5, 5 are in the folded state as shown in FIG. 3, the rotary contact pin 37 is not pushed by the contact part 38, and the cover 34 descends by its own weight. It rotates to the state and covers the dog clutch 33. Therefore, it is possible to prevent the mud from entering the dog clutch 33. Reference numeral 39 is a connecting rope for stably connecting the rear end portions when the working device portions 5 and 5 are folded as shown in FIG.

[0020]

[Effect of device]

 As described above, according to the flat plate of the tiller of the present invention, the flat plate provided at the rear of the rotary working portion has a three-dimensional cutout having a bulge in the front-rear direction over the entire length thereof. Since many platters are formed at predetermined intervals, water and mud accumulated on the front side of the flat plate from the rotary working part should be actively escaped rearward from the three-dimensional cutouts when the tiller performs scratching work. It is possible to eliminate the protrusion to the side of the working machine. As a result, the leveling performance of the working machine is improved, and the working efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a plan view showing a state in which a working device portion of a tillage implement according to the present invention is expanded to a working state.

FIG. 2 is a rear view of the same partial cross section.

FIG. 3 is a plan view of a state in which the work device portion is folded.

FIG. 4 is a plan view of a work state lock mechanism for locking the work device portion in a work state in a locked state.

FIG. 5 is a plan view showing a state in which the work state lock mechanism is unlocked.

FIG. 6 is a side view of the folding lock mechanism that locks the work device portion in a folded state in a locked state.

FIG. 7 is a bottom view of the same portion.

FIG. 8 is a side view showing a state where the lock of the folding lock mechanism is released.

FIG. 9 is a perspective view of a flat plate portion.

FIG. 10 is an explanatory view of the same operation.

FIG. 11 is a plan view of the power transmission unit cover device in a covered state.

FIG. 12 is an explanatory diagram of the same operation.

FIG. 13 is a front view of the power transmission unit cover device in a covered state.

[Explanation of Codes] 1 Tillage implement 2 Connection to tractor 3 Gear box 4 Transmission system 5 Working device part 6 Central part 6a Vertical frame 6b Frame pipe 7 Link rod 8 Hinge part 9 Working state lock mechanism 10, 11 Lock pin 10a, 11a Moving lock pin 12, 13, 23 Shaft 14, 15, 24 Engaging hook 14a, 15a, 24a Inclined surface (cam surface) 16, 26 Operating lever 17, 18 Connecting arm 19 Connecting rod 20, 27 Toggle spring 21, 29 Automatic return lever 22 Folding state lock mechanism 30 Flat plate 31 Three-dimensional notch 32, 33 Dog clutch 34 Clutch cover 35 Centering support arm 36 Support cylinder 37 Rotating abutment pin 38 Abutment portion 39 Connecting rope

Claims (1)

[Scope of utility model registration request] 1. A plowing operation in which a tractor is mounted on a rear portion of the tractor through a three-point link mechanism to transmit power from a PTO shaft of the tractor to a gear box of a working machine, and a flat plate is provided behind the rotary working portion. In the machine, a flat plate of a tilling machine characterized in that a plurality of three-dimensional notches having bulges in the front-rear direction are formed at predetermined intervals on the flat plate over the entire length thereof.